#include "MeRGBLed.h"
MeRGBLed::MeRGBLed():MePort(0) {
	setNumber(4);
}
MeRGBLed::MeRGBLed(uint8_t port):MePort(port) {
	pinMask = digitalPinToBitMask(s2);
	ws2812_port = portOutputRegister(digitalPinToPort(s2));
	ws2812_port_reg = portModeRegister(digitalPinToPort(s2));
//	*ws2812_port_reg |= pinMask; //set pinMode OUTPUT
        pinMode(s2,OUTPUT);
	setNumber(4);
}
MeRGBLed::MeRGBLed(uint8_t port,uint8_t slot):MePort(port){
	if(slot==1){
		pinMask = digitalPinToBitMask(s2);
		ws2812_port = portOutputRegister(digitalPinToPort(s2));
		ws2812_port_reg = portModeRegister(digitalPinToPort(s2));
                pinMode(s2,OUTPUT);
	}else{
		pinMask = digitalPinToBitMask(s1);
		ws2812_port = portOutputRegister(digitalPinToPort(s1));
		ws2812_port_reg = portModeRegister(digitalPinToPort(s1));
                pinMode(s1,OUTPUT);
	}
	//*ws2812_port_reg |= pinMask; // set pinMode OUTPUT
	setNumber(4);
}
void MeRGBLed::reset(uint8_t port){
        _port = port;
	s2 = mePort[port].s2;
	s1 = mePort[port].s1;
	pinMask = digitalPinToBitMask(s2);
	ws2812_port = portOutputRegister(digitalPinToPort(s2));
	ws2812_port_reg = portModeRegister(digitalPinToPort(s2));
        //*ws2812_port_reg |= pinMask;
        pinMode(s2,OUTPUT);
}
void MeRGBLed::setNumber(uint8_t num_leds){
	count_led = num_leds;
	pixels = (uint8_t*)malloc(count_led*3);
}
cRGB MeRGBLed::getColorAt(uint8_t index) {
	
	cRGB px_value;
	
	if(index < count_led) {
		
		uint8_t tmp;
		tmp = index * 3;
		
		px_value.g = pixels[tmp];
		px_value.r = pixels[tmp+1];
		px_value.b = pixels[tmp+2];
	}
	
	return px_value;
}

uint8_t MeRGBLed::getNumber(){
	return count_led;
}
bool MeRGBLed::setColorAt(uint8_t index, uint8_t red,uint8_t green,uint8_t blue) {
	if(index < count_led) {
		uint8_t tmp = index * 3;
		pixels[tmp] = green;
		pixels[tmp+1] = red;
		pixels[tmp+2] = blue;
		
		return true;
	} 
	return false;
}
bool MeRGBLed::setColorAt(uint8_t index, long value) {
	if(index < count_led) {
		uint8_t tmp = index * 3;
		uint8_t red = (value&0xff0000)>>16;
		uint8_t green = (value&0xff00)>>8;
		uint8_t blue = value&0xff;
		pixels[tmp] = green;
		pixels[tmp+1] = red;
		pixels[tmp+2] = blue;
		return true;
	} 
	return false;
}
/*
  This routine writes an array of bytes with RGB values to the Dataout pin
  using the fast 800kHz clockless WS2811/2812 protocol.
*/

// Timing in ns
#define w_zeropulse   350
#define w_onepulse    900
#define w_totalperiod 1250

// Fixed cycles used by the inner loop
#define w_fixedlow    3
#define w_fixedhigh   6
#define w_fixedtotal  10   

// Insert NOPs to match the timing, if possible
#define w_zerocycles    (((F_CPU/1000)*w_zeropulse          )/1000000)
#define w_onecycles     (((F_CPU/1000)*w_onepulse    +500000)/1000000)
#define w_totalcycles   (((F_CPU/1000)*w_totalperiod +500000)/1000000)

// w1 - nops between rising edge and falling edge - low
#define w1 (w_zerocycles-w_fixedlow)
// w2   nops between fe low and fe high
#define w2 (w_onecycles-w_fixedhigh-w1)
// w3   nops to complete loop
#define w3 (w_totalcycles-w_fixedtotal-w1-w2)

#if w1>0
  #define w1_nops w1
#else
  #define w1_nops  0
#endif

// The only critical timing parameter is the minimum pulse length of the "0"
// Warn or throw error if this timing can not be met with current F_CPU settings.
#define w_lowtime ((w1_nops+w_fixedlow)*1000000)/(F_CPU/1000)
#if w_lowtime>550
   #error "Light_ws2812: Sorry, the clock speed is too low. Did you set F_CPU correctly?"
#elif w_lowtime>450
   #warning "Light_ws2812: The timing is critical and may only work on WS2812B, not on WS2812(S)."
   #warning "Please consider a higher clockspeed, if possible"
#endif   

#if w2>0
#define w2_nops w2
#else
#define w2_nops  0
#endif

#if w3>0
#define w3_nops w3
#else
#define w3_nops  0
#endif

#define w_nop1  "nop      \n\t"
#define w_nop2  "rjmp .+0 \n\t"
#define w_nop4  w_nop2 w_nop2
#define w_nop8  w_nop4 w_nop4
#define w_nop16 w_nop8 w_nop8

void  MeRGBLed::rgbled_sendarray_mask(uint8_t *data,uint16_t datlen,uint8_t maskhi,uint8_t *port)
{
  	uint8_t curbyte,ctr,masklo;
	uint8_t oldSREG = SREG;
	cli();  //Disables all interrupts
	
  masklo = *port & ~maskhi;
  maskhi = *port | 	maskhi;
  
  while (datlen--) {
    curbyte=*data++;
    
    asm volatile(
    "       ldi   %0,8  \n\t"
    "loop%=:            \n\t"
    "       st    X,%3 \n\t"    //  '1' [02] '0' [02] - re
#if (w1_nops&1)
w_nop1
#endif
#if (w1_nops&2)
w_nop2
#endif
#if (w1_nops&4)
w_nop4
#endif
#if (w1_nops&8)
w_nop8
#endif
#if (w1_nops&16)
w_nop16
#endif
    "       sbrs  %1,7  \n\t"    //  '1' [04] '0' [03]
    "       st    X,%4 \n\t"     //  '1' [--] '0' [05] - fe-low
    "       lsl   %1    \n\t"    //  '1' [05] '0' [06]
#if (w2_nops&1)
  w_nop1
#endif
#if (w2_nops&2)
  w_nop2
#endif
#if (w2_nops&4)
  w_nop4
#endif
#if (w2_nops&8)
  w_nop8
#endif
#if (w2_nops&16)
  w_nop16 
#endif
    "       brcc skipone%= \n\t"    //  '1' [+1] '0' [+2] - 
    "       st   X,%4      \n\t"    //  '1' [+3] '0' [--] - fe-high
    "skipone%=:               "     //  '1' [+3] '0' [+2] - 

#if (w3_nops&1)
w_nop1
#endif
#if (w3_nops&2)
w_nop2
#endif
#if (w3_nops&4)
w_nop4
#endif
#if (w3_nops&8)
w_nop8
#endif
#if (w3_nops&16)
w_nop16
#endif

    "       dec   %0    \n\t"    //  '1' [+4] '0' [+3]
    "       brne  loop%=\n\t"    //  '1' [+5] '0' [+4]
    :	"=&d" (ctr)
//    :	"r" (curbyte), "I" (_SFR_IO_ADDR(ws2812_PORTREG)), "r" (maskhi), "r" (masklo)
    :	"r" (curbyte), "x" (port), "r" (maskhi), "r" (masklo)
    );
  }
  
  SREG = oldSREG;
}
void MeRGBLed::show() {
//	*ws2812_port_reg |= pinMask; // Enable DDR
	rgbled_sendarray_mask(pixels,3*count_led,pinMask,(uint8_t*) ws2812_port);	
}

MeRGBLed::~MeRGBLed() {
	
	
}
